Isotopes of Argon

List of known isotopes of the element Argon.

Isotope	t½	%	Spin/parity	Radius	Isotopic mass	Discovery
³⁰Ar	10 ps	syn.	0+	—	3.002·10⁷ ±192 keV/c²	2015
³¹Ar	15 ±3 ms	syn.	5/2+	—	3.101·10⁷ ±215 keV/c²	1986
³²Ar	98 ±2 ms	syn.	0+	3.346 ±0.0062 fm	3.199·10⁷ ±1.9 keV/c²	1977
³³Ar	173 ±20 ms	syn.	1/2+	3.343 ±0.0058 fm	3.298·10⁷ ±0.43 keV/c²	1964
³⁴Ar	843.8 ±4 ms	syn.	0+	3.365 ±0.004 fm	3.398·10⁷ ±0.083 keV/c²	1966
³⁵Ar	1.775 ±10 s	syn.	3/2+	3.363 ±0.0042 fm	3.497·10⁷ ±0.73 keV/c²	1940
³⁶Ar	stab.	0.3336 ±0.021 %	0+	3.39 ±0.0023 fm	3.596·10⁷ ±0.028 keV/c²	1920
³⁷Ar	35.01 ±19 d	syn.	3/2+	3.39 ±0.0022 fm	3.696·10⁷ ±0.221 keV/c²	1941
³⁸Ar	stab.	0.0629 ±0.007 %	0+	3.402 ±0.0019 fm	3.796·10⁷ ±0.209 keV/c²	1934
³⁹Ar	268 ±8 a	syn.	7/2-	3.409 ±0.0031 fm	3.896·10⁷ ±5.367 keV/c²	1950
⁴⁰Ar	stab.	99.6 ±0.025 %	0+	3.427 ±0.0026 fm	3.996·10⁷ ±0.00234 keV/c²	1920
⁴¹Ar	109.6 ±4 m	syn.	7/2-	3.425 ±0.003 fm	4.096·10⁷ ±0.372 keV/c²	1936
⁴²Ar	32.9 ±11 a	syn.	0+	3.441 ±0.0041 fm	4.196·10⁷ ±6.2 keV/c²	1952
⁴³Ar	5.37 ±6 m	syn.	5/2(-)	3.435 ±0.0039 fm	4.296·10⁷ ±5.7 keV/c²	1969
⁴⁴Ar	11.87 ±5 m	syn.	0+	3.445 ±0.0046 fm	4.396·10⁷ ±1.7 keV/c²	1969
⁴⁵Ar	21.48 ±15 s	syn.	5/2- 7/2-	—	4.496·10⁷ ±0.55 keV/c²	1974
⁴⁶Ar	8.4 ±6 s	syn.	0+	3.437 ±0.0044 fm	4.596·10⁷ ±2.5 keV/c²	1974
⁴⁷Ar	1.23 ±3 s	syn.	(3/2)-	—	4.697·10⁷ ±1.3 keV/c²	1985
⁴⁸Ar	416 ±19 ms	syn.	0+	—	4.797·10⁷ ±18 keV/c²	2004
⁴⁹Ar	170 ±50 ms	syn.	—	—	4.898·10⁷ ±429 keV/c²	1989
⁵⁰Ar	106 ±6 ms	syn.	0+	—	4.998·10⁷ ±537 keV/c²	1989
⁵¹Ar	stab.	syn.	—	—	5.099·10⁷ ±429 keV/c²	1989
⁵²Ar	stab.	syn.	0+	—	5.199·10⁷ ±644 keV/c²	2009
⁵³Ar	620 ns	syn.	—	—	5.3·10⁷ ±750 keV/c²	2009

30ArArgon-30

Classification	z: 18; n: 12; m: 30
Half life	10 ps
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	two-proton emission
Discovery	2015
Mass excess	22,070 ±179 keV
Binding energy	6,866 ±6 keV
Single-particle energy	-760 ±128 keV
Neutron separation energy	23,960 ±474 keV
Q value for electron capture	17,390 ±180.5 keV

Point at nuclide Decay chain of Argon-30

31ArArgon-31

Classification	z: 18; n: 13; m: 31
Half life	15 ±3 ms
Natural abundance	synthetic nuclide
Spin/parity	5/2+
Decay modes	electron capture + β⁺ decay; β⁺ decay + proton emission; β⁺ decay with two-proton emission
Discovery	1986
Mass excess	11,320 ±200 keV
Binding energy	7,252 ±6 keV
Single-particle energy	638 ±201 keV
Neutron separation energy	18,810 ±268 keV
Q value for electron capture	18,350 ±200 keV
β⁻ decay energy	-22,940 ±361 keV

Point at nuclide Decay chain of Argon-31

32ArArgon-32

Classification	z: 18; n: 14; m: 32
Half life	98 ±2 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	electron capture + β⁺ decay; electron capture + proton emission
Discovery	1977
Mass excess	-2,201 ±1.77 keV
Binding energy	7,700 ±0.0553 keV
Single-particle energy	2,454 ±3.874 keV
Neutron separation energy	21,590 ±200 keV
Q value for electron capture	11,130 ±1.857 keV
β⁻ decay energy	-24,190 ±400 keV
β⁻ decay energy with neutron	-44,540 ±300 keV

Point at nuclide Decay chain of Argon-32

33ArArgon-33

Classification	z: 18; n: 15; m: 33
Half life	173 ±20 ms
Natural abundance	synthetic nuclide
Spin/parity	1/2+
Decay modes	electron capture + β⁺ decay; electron capture + proton emission
Discovery	1964
Mass excess	-9,385 ±0.401 keV
Binding energy	7,928 ±0.0121 keV
Single-particle energy	3,338 ±0.6899 keV
Neutron separation energy	15,250 ±1.814 keV
Q value for electron capture	11,610 ±0.56 keV
β⁻ decay energy	-16,930 ±200 keV
β⁻ decay energy with neutron	-39,450 ±400 keV
Magnetic dipole moment	-0.723 ±0.006 μN

Point at nuclide Decay chain of Argon-33

34ArArgon-34

Classification	z: 18; n: 16; m: 34
Half life	843.8 ±4 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	electron capture + β⁺ decay
Discovery	1966
Mass excess	-18,380 ±0.078 keV
Binding energy	8,197 ±0.0023 keV
Single-particle energy	4,663 ±0.3984 keV
Neutron separation energy	17,060 ±0.408 keV
Q value for electron capture	6,061 ±0.092 keV
β⁻ decay energy	-17,160 ±196 keV
β⁻ decay energy with neutron	-33,990 ±200 keV

Point at nuclide Decay chain of Argon-34

35ArArgon-35

Classification	z: 18; n: 17; m: 35
Half life	1.775 ±10 s
Natural abundance	synthetic nuclide
Spin/parity	3/2+
Decay modes	electron capture + β⁺ decay
Discovery	1940
Mass excess	-23,050 ±0.68 keV
Binding energy	8,327 ±0.0194 keV
Single-particle energy	5,896 ±0.6813 keV
Neutron separation energy	12,740 ±0.6839 keV
Q value for electron capture	5,966 ±0.681 keV
β⁻ decay energy	-11,880 ±0.8516 keV
β⁻ decay energy with neutron	-29,900 ±196 keV
Magnetic dipole moment	0.632 ±2·10^-4 μN
Electric quadrupole moment	-0.084 ±0.015 b

Point at nuclide Decay chain of Argon-35

36ArArgon-36

Classification	z: 18; n: 18; m: 36
Half life	stable nuclide
Natural abundance	0.3336 ±0.021 %
Spin/parity	0+
Discovery	1920
Mass excess	-30,240 ±0.027 keV
Binding energy	8,519 ±8·10^-4 keV
Single-particle energy	8,506 ±0.0446 keV
Neutron separation energy	15,250 ±0.6808 keV
Q value for electron capture	-709.6 ±0.045 keV
β⁻ decay energy	-12,820 ±0.3259 keV
β⁻ decay energy with neutron	-27,130 ±0.513 keV
Magnetic dipole moment	1 ±0.4 μN
Electric quadrupole moment	0.11 ±0.06 b

Point at nuclide

37ArArgon-37

Classification	z: 18; n: 19; m: 37
Half life	35.01 ±19 d
Natural abundance	synthetic nuclide
Spin/parity	3/2+
Decay modes	electron capture (EC)
Discovery	1941
Mass excess	-30,950 ±0.207 keV
Binding energy	8,527 ±0.0056 keV
Single-particle energy	8,714 ±0.21 keV
Neutron separation energy	8,787 ±0.2084 keV
Q value for electron capture	813.8 ±0.213 keV
β⁻ decay energy	-6,148 ±0.227 keV
β⁻ decay energy with neutron	-21,610 ±0.3852 keV
Magnetic dipole moment	1.146 ±0.005 μN
Electric quadrupole moment	0.076 ±0.003 b

Point at nuclide Decay chain of Argon-37

38ArArgon-38

Classification	z: 18; n: 20; m: 38
Half life	stable nuclide
Natural abundance	0.0629 ±0.007 %
Spin/parity	0+
Discovery	1934
Mass excess	-34,720 ±0.195 keV
Binding energy	8,614 ±0.0051 keV
Single-particle energy	10,240 ±0.2017 keV
Neutron separation energy	11,830 ±0.2841 keV
Q value for electron capture	-4,917 ±0.218 keV
β⁻ decay energy	-5,915 ±0.0448 keV
β⁻ decay energy with neutron	-17,990 ±0.2164 keV
Magnetic dipole moment	0.48 ±0.24 μN

Point at nuclide

39ArArgon-39

Classification	z: 18; n: 21; m: 39
Half life	268 ±8 a
Natural abundance	synthetic nuclide
Spin/parity	7/2-
Decay modes	β⁻ decay
Discovery	1950
Mass excess	-33,250 ±5 keV
Binding energy	8,562 ±0.1282 keV
Single-particle energy	10,730 ±5.001 keV
Neutron separation energy	6,598 ±5.003 keV
Q value for electron capture	-3,442 ±5.291 keV
β⁻ decay energy	565 ±5 keV
β⁻ decay energy with neutron	-12,520 ±5.003 keV
Magnetic dipole moment	-1.59 ±0.015 μN
Electric quadrupole moment	-0.116 ±0.002 b

Point at nuclide Decay chain of Argon-39

40ArArgon-40

Classification	z: 18; n: 22; m: 40
Half life	stable nuclide
Natural abundance	99.6 ±0.025 %
Spin/parity	0+
Discovery	1920
Mass excess	-35,040 ±0.00218 keV
Binding energy	8,595 ±2·10^-4 keV
Single-particle energy	12,520 ±1.732 keV
Neutron separation energy	9,869 ±5 keV
Q value for electron capture	-7,483 ±32.06 keV
β⁻ decay energy	-1,505 ±0.0559 keV
β⁻ decay energy with neutron	-9,305 ±0.004 keV
Magnetic dipole moment	-0.04 ±0.06 μN
Electric quadrupole moment	0.01 ±0.04 b

Point at nuclide

41ArArgon-41

Classification	z: 18; n: 23; m: 41
Half life	109.6 ±4 m
Natural abundance	synthetic nuclide
Spin/parity	7/2-
Decay modes	β⁻ decay
Discovery	1936
Mass excess	-33,070 ±0.347 keV
Binding energy	8,534 ±0.0085 keV
Single-particle energy	12,790 ±32.06 keV
Neutron separation energy	6,098 ±0.3473 keV
Q value for electron capture	-5,761 ±68.72 keV
β⁻ decay energy	2,492 ±0.3473 keV
β⁻ decay energy with neutron	-7,604 ±0.3518 keV
Magnetic dipole moment	-1.31 ±0.008 μN
Electric quadrupole moment	-0.042 ±0.004 b

Point at nuclide Decay chain of Argon-41

42ArArgon-42

Classification	z: 18; n: 24; m: 42
Half life	32.9 ±11 a
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay
Discovery	1952
Mass excess	-34,430 ±5.775 keV
Binding energy	8,555 ±0.1375 keV
Single-particle energy	14,400 ±68.96 keV
Neutron separation energy	9,426 ±5.785 keV
Q value for electron capture	-9,591 ±59.89 keV
β⁻ decay energy	599.3 ±5.776 keV
β⁻ decay energy with neutron	-6,935 ±5.775 keV

Point at nuclide Decay chain of Argon-42

43ArArgon-43

Classification	z: 18; n: 25; m: 43
Half life	5.37 ±6 m
Natural abundance	synthetic nuclide
Spin/parity	5/2(-)
Decay modes	β⁻ decay
Discovery	1969
Mass excess	-32,010 ±5.31 keV
Binding energy	8,488 ±0.1235 keV
Single-particle energy	14,460 ±59.85 keV
Neutron separation energy	5,658 ±7.845 keV
Q value for electron capture	-7,851 ±62.08 keV
β⁻ decay energy	4,565 ±5.325 keV
β⁻ decay energy with neutron	-5,060 ±5.31 keV
Magnetic dipole moment	-1.022 ±0.006 μN
Electric quadrupole moment	0.142 ±0.014 b

Point at nuclide Decay chain of Argon-43

44ArArgon-44

Classification	z: 18; n: 26; m: 44
Half life	11.87 ±5 m
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay
Discovery	1969
Mass excess	-32,680 ±1.584 keV
Binding energy	8,493 ±0.036 keV
Single-particle energy	15,800 ±61.87 keV
Neutron separation energy	8,734 ±5.54 keV
Q value for electron capture	-12,200 ±85.58 keV
β⁻ decay energy	3,108 ±1.638 keV
β⁻ decay energy with neutron	-4,170 ±1.635 keV

Point at nuclide Decay chain of Argon-44

45ArArgon-45

Classification	z: 18; n: 27; m: 45
Half life	21.48 ±15 s
Natural abundance	synthetic nuclide
Spin/parity	5/2- 7/2-
Decay modes	β⁻ decay
Discovery	1974
Mass excess	-29,780 ±0.512 keV
Binding energy	8,419 ±0.0114 keV
Single-particle energy	16,580 ±85.56 keV
Neutron separation energy	5,168 ±1.664 keV
Q value for electron capture	-11,510 ±136.1 keV
β⁻ decay energy	6,844 ±0.7311 keV
β⁻ decay energy with neutron	-2,061 ±0.662 keV

Point at nuclide Decay chain of Argon-45

46ArArgon-46

Classification	z: 18; n: 28; m: 46
Half life	8.4 ±6 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay
Discovery	1974
Mass excess	-29,780 ±2.329 keV
Binding energy	8,412 ±0.0506 keV
Single-particle energy	18,790 ±136.1 keV
Neutron separation energy	8,071 ±2.384 keV
Q value for electron capture	-16,040 ±97.27 keV
β⁻ decay energy	5,642 ±2.439 keV
β⁻ decay energy with neutron	-1,227 ±2.386 keV

Point at nuclide Decay chain of Argon-46

47ArArgon-47

Classification	z: 18; n: 29; m: 47
Half life	1.23 ±3 s
Natural abundance	synthetic nuclide
Spin/parity	(3/2)-
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1985
Mass excess	-25,370 ±1.211 keV
Binding energy	8,311 ±0.0258 keV
Single-particle energy	18,920 ±97.25 keV
Neutron separation energy	3,667 ±2.624 keV
Q value for electron capture	-15,790 ±200 keV
β⁻ decay energy	10,340 ±1.849 keV
β⁻ decay energy with neutron	1,975 ±1.412 keV

Point at nuclide Decay chain of Argon-47

48ArArgon-48

Classification	z: 18; n: 30; m: 48
Half life	416 ±19 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	2004
Mass excess	-22,360 ±16.76 keV
Binding energy	8,243 ±0.3493 keV
Single-particle energy	20,060 ±201 keV
Neutron separation energy	5,058 ±16.81 keV
Q value for electron capture	-18,080 ±500.2 keV
β⁻ decay energy	9,929 ±16.78 keV
β⁻ decay energy with neutron	5,285 ±16.82 keV

Point at nuclide Decay chain of Argon-48

49ArArgon-49

Classification	z: 18; n: 31; m: 49
Half life	170 ±50 ms
Natural abundance	synthetic nuclide
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1989
Mass excess	-17,060 ±400 keV
Binding energy	8,132 ±8 keV
Single-particle energy	20,060 ±640 keV
Neutron separation energy	2,777 ±400 keV
Q value for electron capture	-17,800 ±565.6 keV
β⁻ decay energy	12,550 ±400 keV
β⁻ decay energy with neutron	7,153 ±400 keV

Point at nuclide Decay chain of Argon-49

50ArArgon-50

Classification	z: 18; n: 32; m: 50
Half life	106 ±6 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay; β⁻ decay with neutron emission; β⁻ decay with two-neutron emission
Discovery	1989
Mass excess	-13,230 ±500 keV
Binding energy	8,054 ±10 keV
Single-particle energy	21,250 ±640 keV
Neutron separation energy	4,241 ±640 keV
Q value for electron capture	-20,930 ±640.3 keV
β⁻ decay energy	12,490 ±500 keV
β⁻ decay energy with neutron	8,310 ±500 keV

Point at nuclide Decay chain of Argon-50

51ArArgon-51

Classification	z: 18; n: 33; m: 51
Half life	stable nuclide
Natural abundance	synthetic nuclide
Discovery	1989
Mass excess	-6,490 ±400 keV
Binding energy	7,922 ±8 keV
Single-particle energy	21,470 ±565 keV
Neutron separation energy	1,331 ±640 keV
Q value for electron capture	-20,780 ±806.2 keV
β⁻ decay energy	16,020 ±400 keV
β⁻ decay energy with neutron	11,160 ±400 keV

Point at nuclide

52ArArgon-52

Classification	z: 18; n: 34; m: 52
Half life	stable nuclide
Natural abundance	synthetic nuclide
Spin/parity	0+
Discovery	2009
Mass excess	-1,380 ±600 keV
Binding energy	7,827 ±12 keV
Single-particle energy	22,950 ±922 keV
Neutron separation energy	2,961 ±721 keV
β⁻ decay energy	15,750 ±601 keV
β⁻ decay energy with neutron	13,060 ±600 keV

Point at nuclide

53ArArgon-53

Classification	z: 18; n: 35; m: 53
Half life	620 ns
Natural abundance	synthetic nuclide
Decay modes	β⁻ decay with two-neutron emission; β⁻ decay with neutron emission; β⁻ decay
Discovery	2009
Mass excess	6,791 ±699 keV
Binding energy	7,677 ±13 keV
Single-particle energy	22,850 ±989 keV
Neutron separation energy	-99 ±921 keV
β⁻ decay energy	19,080 ±708 keV
β⁻ decay energy with neutron	15,850 ±699 keV

Point at nuclide Decay chain of Argon-53

Isotopes of Argon

30ArArgon-30ads_clickcall_splitdownload

31ArArgon-31ads_clickcall_splitdownload

32ArArgon-32ads_clickcall_splitdownload

33ArArgon-33ads_clickcall_splitdownload

34ArArgon-34ads_clickcall_splitdownload

35ArArgon-35ads_clickcall_splitdownload

36ArArgon-36ads_clickdownload

37ArArgon-37ads_clickcall_splitdownload

38ArArgon-38ads_clickdownload

39ArArgon-39ads_clickcall_splitdownload

40ArArgon-40ads_clickdownload

41ArArgon-41ads_clickcall_splitdownload

42ArArgon-42ads_clickcall_splitdownload

43ArArgon-43ads_clickcall_splitdownload

44ArArgon-44ads_clickcall_splitdownload

45ArArgon-45ads_clickcall_splitdownload

46ArArgon-46ads_clickcall_splitdownload

47ArArgon-47ads_clickcall_splitdownload

48ArArgon-48ads_clickcall_splitdownload

49ArArgon-49ads_clickcall_splitdownload

50ArArgon-50ads_clickcall_splitdownload

51ArArgon-51ads_clickdownload

52ArArgon-52ads_clickdownload

53ArArgon-53ads_clickcall_splitdownload

30ArArgon-30

31ArArgon-31

32ArArgon-32

33ArArgon-33

34ArArgon-34

35ArArgon-35

36ArArgon-36

37ArArgon-37

38ArArgon-38

39ArArgon-39

40ArArgon-40

41ArArgon-41

42ArArgon-42

43ArArgon-43

44ArArgon-44

45ArArgon-45

46ArArgon-46

47ArArgon-47

48ArArgon-48

49ArArgon-49

50ArArgon-50

51ArArgon-51

52ArArgon-52

53ArArgon-53